Velocity stacks of scoop

[Blackmagic94]

on the jet botë

What actually helps out more. Seems like the velocity stacks actually would work better

 

[Backlash]

I'd use the cupholder on the right.

 

[gqchris]

Not sure on function, but I've used both and I prefer a Scoop for looks. Like this.

On that same note, looking at that pic, my OCD is kicking in full time!!

 

[Blackmagic94]

Yeah tell me about. When I get back from Alaska I’m ripping a lot of shit off lol

 

[coolchange]

Just don't put one of those fake shotgun double barrel hilborn want to be scoops on it.

 

[westair]

Not sure on function, but I've used both and I prefer a Scoop for looks. Like this.

On that same note, looking at that pic, my OCD is kicking in full time!!

I would go with something like this too

 

[Blackmagic94]

Just don't put one of those fake shotgun double barrel hilborn want to be scoops on it.

No actually Holley 4150 style velocity stack. I’ve seen them almost always ran on engine dyno. Just a nice big spun alum transition to the barrels. CP performance has some with built in stainless mesh screens as well

 

[Racey]

No actually Holley 4150 style velocity stack. I’ve seen them almost always ran on engine dyno. Just a nice big spun alum transition to the barrels. CP performance has some with built in stainless mesh screens as well

Scoop is more functional for debris getting in the carb, and there is no wind blowing in the dyno cell so velocity stack may not work the same in open air with wind blowing across it, as it does inside of an air box under a hood, or in the dyno cell.

 

[RiverDave]

Think I’d find a air filter that crosses both carbs

 

[was thatguy]

Scoop is more functional for debris getting in the carb, and there is no wind blowing in the dyno cell so velocity stack may not work the same in open air with wind blowing across it, as it does inside of an air box under a hood, or in the dyno cell.

Stacks with no filter or arrestor will siphon across the top due to pressure drop from forward motion.
It changes everything as compared to a dyno run.
I found that out as a 22 year old when raw fuel was getting on my windshield in my bracket Nova.

I always run a scoop and arrestors on my boats. You can vent the scoop as well to try to mimick static psi across the carbs like it saw on the dyno.
I just check my plugs and if they are lean or rich I’ll adjust the venting area.
It’s probanly nitpicking at that point though.

 

[BIG MIKE]

I heard years ago a forward facing scoop doesn’t do much until over a certain speed.

I also think stacks look better on a period correct late 70’s Jet Bote and scoop looks good on an 80’s or later. JMO

 

[Blackmagic94]

Where can I get the tall fiberglass scoops. I’m not a fan of the metal ones, looks to much like a cheap mail box to me

 

[Jed-O]

Where can I get the tall fiberglass scoops. I’m not a fan of the metal ones, looks to much like a cheap mail box to me

Summit. com

 

[coolchange]

Harwood sells a lot of scoops.
Me personally, I would put one of those old-school fiberglass snorkel tops on it. Get some velocity stacks, and mold a fiberglass Base from them. Then that would give you a room if you want to run the flame arrestors, then put the scoop on top. Then paint it to match the boat, stripes, name, goofy rat fink cartoon thing. Lol.
In my opinion, and that don't amount to s***, unless it's a 1471, Hilborns, turbo, etc., There should not be one single item that attracts all your attention. It should all flow. I see some pretty nice boats and cars, and all I can think about is they should have spent that $500 from the scoop on something more valuable.
But hey it's their boat and if that makes them feel better about it more power to them.
Mini rant over lol.

 

[Dana757]

A scoop backwards might be the difference between getting swamped or not.

 

[monkeyswrench]

...Enderle "BigUgly"

 

[Sleek-Jet]

Just looking at that pic I can smell the hot fiberglass and warm motor oil...

I like the metal scoops with arrestors.

 

[BONER]

I still say one of these. Because it screams "Full Jet Bote".

 

[was thatguy]

I still say one of these. Because it screams "Full Jet Bote".


View attachment 773107

HELL YES!!

I must have one!

 

[TITTIES AND BEER]

Not sure on function, but I've used both and I prefer a Scoop for looks. Like this.

On that same note, looking at that pic, my OCD is kicking in full time!!

Ya those air cleaners look like crap scoop looks good

 

[500bbc]

Ppfffttt, stack MFI.

 

[was thatguy]

Ya those look like crap

I have that one on my boat.
It ain’t so bad.
2 arrestors hold it on.

 

[LargeOrangeFont]

Scoop, but a squared off scoop. I like the one they ran on the Hot Rod Crusher Camaro.

Same car with stacks is a failure at life.

 

[TITTIES AND BEER]

I have that one on my boat.
It ain’t so bad.
2 arrestors hold it on.
View attachment 773174

The air cleaners look like crap scoop looks better

 

[was thatguy]

I think the answer is a small scoop on top of each stack...

 

[LargeOrangeFont]

I have that one on my boat.
It ain’t so bad.
2 arrestors hold it on.
View attachment 773174

Run that chrome mailbox scoop @Blackmagic94

 

[TITTIES AND BEER]

I have that one on my boat.
It ain’t so bad.
2 arrestors hold it on.
View attachment 773174

But you can’t see them scoop looks clean

 

[Moneypit]

Sorry but a blower with carbs just looks....eh... cheap, or incomplete. Like you're just running them until your bird/bug catcher hat arrives... As it is, the blower will pull a lot more than any air flow "induction aid" will push..Like was already said, MFI, Crower MFI, with the staggered stacks, (not with the blower), is the sexist piece you can put on a boat..
Ray

 

[was thatguy]

But you can’t see them scoop looks clean

Ya it’s tricky getting the hold downs started and tight. I made them from ready rod after I built the Carbs from scratch.
Holly race bowls, Allstate billet 4150 plates.
They’re 750’s, but there is no secondary idle slots in the plates or idle screws in the secondary bowls. I also put side hung bowls all around, plugged up the transfer tube holes with little freeze plugs for 4 way feed.
I conferenced about the plates with Allstate and thy kind of lined me out in managing secondary fuel rotation.
Meaning that lack of secondary idle circuit requires WOT to rotate fuel inventory in the secondary’s. I replied to them that that was no problem as it runs WOT most of the time!
I run power valves as well.

These carbs work. I pulled the 660 center squirters off and once I got these dialed they perform better than the 660’s and burn WAY less fuel.

One thing I’ve noticed with velocity stack boats is they seem to fly off and get lost kind of often!

 

[Sharp Shooter]

Best scoop

Or worst scoop.
Nothing screams red neck like a fake Mr. Gasket injector hat with butterflies and linkage all hooked up and working. They can besorta tolerable if they're gutted.

 

[lbhsbz]

None make a shit bit of difference unless you consider water intrusion, in which case anything looks stupid turning it around backwards to aid in the prevention of that.

I think folks don’t quite understand how much air an engine consumes. If it wants it, it’ll find it. A stupid scoop won’t help anything...unless it’s making a blower or turbos look prettier.

 

[Sharp Shooter]

None make a shit bit of difference unless you consider water intrusion, in which case anything looks stupid turning it around backwards to aid in the prevention of that.

I think folks don’t quite understand how much air an engine consumes. If it wants it, it’ll find it. A stupid scoop won’t help anything...unless it’s making a blower or turbos look prettier.

I know guys who have had to jet up after going from velocity stack to scoop. Probably doesn’t matter if your boat only goes 70 but 100+ might change that.

 

[lbhsbz]

I know guys who have had to jet up after going from velocity stack to scoop. Probably doesn’t matter if your boat only goes 70 but 100+ might change that.

I'll do the math tomorrow, but I'm pretty sure the difference in pressure in the amount of air packed into a 40 sq/in hole between 70 and 100mph considering ambient pressure is negligible considering what the engine is already drawing in..... and they were likely not jetted appropriately in the first place.

 

[Blackmagic94]

Sorry but a blower with carbs just looks....eh... cheap, or incomplete. Like you're just running them until your bird/bug catcher hat arrives... As it is, the blower will pull a lot more than any air flow "induction aid" will push..Like was already said, MFI, Crower MFI, with the staggered stacks, (not with the blower), is the sexist piece you can put on a boat..
Ray

Don’t have a blower.

 

[Blackmagic94]

None make a shit bit of difference unless you consider water intrusion, in which case anything looks stupid turning it around backwards to aid in the prevention of that.

I think folks don’t quite understand how much air an engine consumes. If it wants it, it’ll find it. A stupid scoop won’t help anything...unless it’s making a blower or turbos look prettier.

Velocity stacks do make a bit more power from what I’ve seen from dyno tests.

 

[wzuber]

those valve covers suggest a lot, mostly change that tunnel ram out for a nice dual plane, single 850 cfm. carb. A veloctiy stack or scoop won't make a lick of difference perf. wise. The motor will likely run cleaner and actually make useable power. The fuel you save will help pay for parts to build a real engine that benefits from that t-ram. jmo......

 

[guest hs]

My opinion and I have done this in the past on my boats. Velocity stacks belong on an old school flat bottom from the 60-70’s and the basset aluminum scoop belongs on a jet facing forward with flame arrestors in it.

 

[Sharp Shooter]

I'll do the math tomorrow, but I'm pretty sure the difference in pressure in the amount of air packed into a 40 sq/in hole between 70 and 100mph considering ambient pressure is negligible considering what the engine is already drawing in..... and they were likely not jetted appropriately in the first place.

Not jetted appropriately in the first place? I think not...

 

[Sharp Shooter]

Velocity stacks do make a bit more power from what I’ve seen from dyno tests.

They probably would "on a dyno" with no forced air coming in.

 

[69hondo]

Scoop, but a squared off scoop. I like the one they ran on the Hot Rod Crusher Camaro.

View attachment 773171

Same car with stacks is a failure at life.

View attachment 773176

I like that look too. I run the same scoop on my chevelle when the hood is off.

 

[mash on it]

those valve covers suggest a lot, mostly change that tunnel ram out for a nice dual plane, single 850 cfm. carb. A veloctiy stack or scoop won't make a lick of difference perf. wise. The motor will likely run cleaner and actually make useable power. The fuel you save will help pay for parts to build a real engine that benefits from that t-ram. jmo......

A dual plane manifold is for tow trucks and motor homes.

It would benefit from a single plane manifold, like a Victor Jr.

Or just keep the tunnel ram, and fine tune the carbs.

Dan'l

 

[Blackmagic94]

those valve covers suggest a lot, mostly change that tunnel ram out for a nice dual plane, single 850 cfm. carb. A veloctiy stack or scoop won't make a lick of difference perf. wise. The motor will likely run cleaner and actually make useable power. The fuel you save will help pay for parts to build a real engine that benefits from that t-ram. jmo......

I’ve never seen a dual plane on marine bbc application. Even mercury did single planes from the factory on carbs

 

[SBMech]

Scoop with FA inside. Velocity stacks won't do shit in an open air situation, they do make a little bit more on a dyno.

 

[Blackmagic94]

So where can I get this type of scoop?

 

[wzuber]

That's a good looking CP right there. With that pic are you suggesting you want to be able to run like a cp?

 

[Wheeler]

Run that chrome mailbox scoop

You got something against mail boxes?

@RogerThat99

 

[Wheeler]

Who cares what they look like as long as they work.

 

[Blackmagic94]

So any links to what scoops these are

 

[ka0tyk]

 

[Blackmagic94]

No no and no


Gay as grads and it’s a lsx so it’s like two grads fucking each other